Solar Cost Calculator

Solar Cost Calculator — Equipment Pricing, Subsidies, Net Cost, Annual Savings, Payback & 25-Year Profit Solar Cost Calculator is a fast, offline photovoltaic cost and ROI estimator for solar installers, EPC contractors, energy consultants, sales teams, and homeowners. Enter roof dimensions, panel specs, equipment prices, subsidies, and grid tariff — get an instant 2D roof plan, kWp sizing, full cost breakdown, net cost, annual savings, payback period, and cumulative 25-year profit. ROOF DIMENSIONS & SOLAR PARAMETERS Enter roof length, width, and perimeter safety margin in metres or feet. Adjust roof tilt from 0° to 60° and choose orientation from a dropdown (South, South-West, West, East, South-East, North). INTERACTIVE 2D ROOF PLAN High-precision architectural drawing of the roof and usable photovoltaic area, real-time visual simulation of PV panels with cell detail, wind rose compass, inverter box, tilt badge, and roof occupancy percentage. In dark mode, all dimensions are drawn in pure white with high contrast for outdoor site readability. Auto display regulation handles very large dimensions without slowing the interface. PANEL SPECIFICATIONS & SYSTEM TYPE Panel unit power (quick buttons 400 W, 450 W, 500 W, 550 W, or custom) and Peak Sun Hours. Installation type: Grid-Tied, Off-Grid, or Hybrid. PRICE ADDING — DETAILED COSTS Unit price per solar panel, inverter cost, optional battery storage with capacity (kWh) and cost per kWh, balance-of-system supplies (mounting structures, wiring, AC/DC combiner boxes), labour and installation fees, subsidy or tax credit rate (%), and current grid kWh tariff for savings analysis. Tap Calculate for the full analysis and Clear to reset. ENGINEERING RESULTS & ROI ANALYSIS Get total system power in kWp, installable panel count, daily production (kWh/day) and estimated annual production (kWh/year). See full financial breakdown: itemized equipment cost, gross investment, deducted subsidies, net turnkey cost, and cost per watt. Get annual bill savings, payback period in years, and cumulative net profit over 25 years. Environmental impact shows tonnes of CO₂ avoided per year and equivalent trees planted. SAVE, HISTORY & EXPORT Save directly from the results card with a project name and notes. Chronological local database (Room) with persistent storage. Live text search and filters by installation type (All, Grid-Tied, Off-Grid, Hybrid). Project cards are laid out in two clear rows: row 1 shows system power (kWp) and panel count, row 2 shows net investment cost and payback time. Share a technical text report through WhatsApp, email, SMS, or any phone app. Export a standard A4 PDF in the language selected in the app, with KOCHI DIGITAL header. Delete with individual confirmation dialog. SETTINGS Units dropdown: metric (m, m²) or imperial (ft, sq ft). Currency dropdown: USD, EUR, CAD, CHF, FCFA, GBP, AUD, JPY. Language dropdown with real-time translation: French, English, Spanish, Arabic, and Chinese. Theme dropdown: Dark mode (default), Light, or Automatic (System). About section with KOCHI DIGITAL developer info and links to official website, construction calculators, privacy policy, terms, and contact. BUILT FOR THE FIELD Works offline. No sign-up required. High-contrast cards with 1.2–1.5 dp borders for outdoor sunlight readability. Bottom navigation with pure white text in dark mode and Android gesture bar padding. ABOUT KOCHI DIGITAL Kochi Digital builds minimalist, high-performance engineering and construction calculators. Explore more at kochidigital.com. DOWNLOAD SOLAR COST CALCULATOR NOW Get the only solar app you need for equipment pricing, subsidies, ROI, and 25-year profit analysis. Download Solar Cost Calculator today and size any photovoltaic project with confidence — on site, offline, in your language. Official website: https://kochidigital.com/apps/solarcostcalculator/